Message dans http.error avec PHP fatal error

BOnjour,

J’ai ce message qui s’affiche dans http.error depuis quelque temps. Le plugin fonctionne quand même sans soucis.

#0 /var/www/html/plugins/thermoAlternateView/core/class/thermoAlternateView.class.php(437): thermoAlternateView::getLinkCalendar(NULL)
#1 /var/www/html/plugins/thermoAlternateView/core/ajax/thermoAlternateView.ajax.php(31): thermoAlternateView::getNextEventCalendar(NULL, false)
#2 {main}
thrown in /var/www/html/plugins/thermoAlternateView/core/class/thermoAlternateView.class.php on line 549, referer: https://.../index.php?v=m&p=home
[Wed Dec 08 20:32:43.182982 2021] [php7:error] [pid 13495] [client 10.11.0.1:58360] PHP Fatal error:  Uncaught Error: Call to a member function getCmd() on null in /var/www/html/plugins/thermoAlternateView/core/class/thermoAlternateView.class.php:549
Stack trace:
#0 /var/www/html/plugins/thermoAlternateView/core/class/thermoAlternateView.class.php(437): thermoAlternateView::getLinkCalendar(NULL)
#1 /var/www/html/plugins/thermoAlternateView/core/ajax/thermoAlternateView.ajax.php(31): thermoAlternateView::getNextEventCalendar(NULL, false)
#2 {main}
thrown in /var/www/html/plugins/thermoAlternateView/core/class/thermoAlternateView.class.php on line 549, referer: https:/..../index.php?v=m&p=home

Pour information. Merci,